摘要：【中文】本公开涉及一种主动降噪方法、系统以及耳机，其中主动降噪方法包括：响应于耳机的扬声器播放音频信号，通过耳机的回声滤波器确定从扬声器到耳机的耳内麦克风的传输路径的当前传递函数；基于N组预设滤波系数、与每个预设滤波系数对应的预设传递函数以及当前传递函数，确定耳机的前馈滤波器的当前滤波系数；以当前滤波系数来配置前馈滤波器，以进行前馈主动降噪。通过主动对前馈滤波器当前滤波系数的适应性调整，能够降低不同佩戴方式以及不同耳道结构对降噪系统的影响，提高耳机的降噪效果，同时提升用户的听音体验。 【EN】The present disclosure relates to an active noise reduction method, system and earphone, wherein the active noise reduction method comprises: determining, by an echo filter of the headset, a current transfer function of a transmission path from the speaker to an in-ear microphone of the headset in response to the speaker of the headset playing an audio signal; determining the current filter coefficient of a feedforward filter of the earphone based on the N groups of preset filter coefficients, the preset transfer function corresponding to each preset filter coefficient and the current transfer function; the feedforward filter is configured with the current filter coefficients for feedforward active noise reduction. Through the active adaptability adjustment of the current filter coefficient of the feedforward filter, the influence of different wearing modes and different ear canal structures on the noise reduction system can be reduced, the noise reduction effect of the earphone is improved, and the listening experience of a user is improved.

摘要：【中文】本公开涉及一种针对半入耳式耳机的降噪方法、系统和半入耳式耳机，降噪方法包括：响应于半入耳式耳机的扬声器未播放音频信号，计算第一滤波器组的第一系数；响应于扬声器播放音频信号，计算第二滤波器组的第二系数；基于第一基准系数和第二基准系数来确定第一滤波器组的第三基准系数，以使第一滤波器组利用第三基准系数进行滤波，其中，第一基准系数为预先设置的第一滤波器组的系数，第二基准系数为预先设置的第二滤波器组的系数；基于第一系数、第二系数、第一基准系数和第二基准系数来确定第二滤波器组的校准系数，以使第二滤波器组利用校准系数进行滤波。本公开提高了半入耳式耳机的降噪效果，同时抵消了因路径量测而引入的量测误差。 【EN】The present disclosure relates to a noise reduction method and system for a semi-in-ear headphone, and a semi-in-ear headphone, wherein the noise reduction method comprises: in response to the speaker of the semi-in-ear headphone not playing the audio signal, calculating a first coefficient of a first filter bank; calculating a second coefficient of the second filter bank in response to the audio signal being played by the loudspeaker; determining a third reference coefficient of the first filter bank based on the first reference coefficient and the second reference coefficient so that the first filter bank performs filtering by using the third reference coefficient, wherein the first reference coefficient is a preset coefficient of the first filter bank, and the second reference coefficient is a preset coefficient of the second filter bank; calibration coefficients for the second filter bank are determined based on the first coefficients, the second coefficients, the first reference coefficients and the second reference coefficients, such that the second filter bank performs filtering using the calibration coefficients. The present disclosure improves the noise reduction effect of the half-in-ear headphone, while offsetting the measurement error introduced by the path measurement.

摘要：【中文】本公开实施例提供了一种无线耳机及其降噪方法，所述无线耳机包括麦克、接口以及存储器。麦克配置为采集音频信号；接口配置为接收所采集的音频信号；存储器上与多个噪声场景类别分别对应地存储有多个学习网络。所述无线耳机还包括处理器，其配置为：对所接收的音频信号进行分类，以确定所处的噪声场景的类别；基于所确定的噪声场景的类别，调用对应的学习网络对所述音频信号进行降噪处理。使得无线耳机能够通过小的学习网络，达到大规模学习网络所能达到的降噪效果，通过降低深度神经网络的运算复杂度，实现减少运算资源，增加运算速度。另外上述技术方案避免了对耳机腔体和尺寸的要求，降低了耳机生产成本。 【EN】The embodiment of the disclosure provides a wireless headset and a noise reduction method thereof. The microphone is configured to collect an audio signal; the interface is configured to receive the captured audio signal; a plurality of learning networks are stored in the memory in correspondence with the plurality of noise scene categories, respectively. The wireless headset further includes a processor configured to: classifying the received audio signal to determine a class of the noise scene; and calling a corresponding learning network to perform noise reduction processing on the audio signal based on the determined category of the noise scene. The wireless earphone can achieve the noise reduction effect which can be achieved by a large-scale learning network through a small learning network, and the calculation resources are reduced and the calculation speed is increased by reducing the calculation complexity of the deep neural network. In addition, the technical scheme avoids the requirements on the cavity and the size of the earphone, and reduces the production cost of the earphone.

摘要：【中文】本公开涉及一种主动降噪方法、系统以及耳机，其中主动降噪方法包括：响应于耳机的扬声器播放音频信号，通过耳机的回声滤波器确定从扬声器到耳机的耳内麦克风的传输路径的当前传递函数；基于耳机的前馈滤波器的预设滤波系数、所述扬声器到所述耳机的耳内麦克风的传输路径的预设传递函数以及当前传递函数，确定前馈滤波器的当前滤波系数；以及以当前滤波系数来配置前馈滤波器，以进行前馈主动降噪。通过主动对前馈滤波器当前滤波系数的适应性调整，能够降低不同佩戴方式以及不同耳道结构对降噪系统的影响，提高耳机的降噪效果，同时提升用户的听音体验。 【EN】The present disclosure relates to an active noise reduction method, system and earphone, wherein the active noise reduction method comprises: determining, by an echo filter of the headset, a current transfer function of a transmission path from the speaker to an in-ear microphone of the headset in response to the speaker of the headset playing an audio signal; determining a current filter coefficient of a feedforward filter of an earphone based on a preset filter coefficient of the feedforward filter, a preset transfer function of a transmission path from a loudspeaker to an in-ear microphone of the earphone, and a current transfer function; and configuring the feedforward filter with the current filter coefficient to perform feedforward active noise reduction. Through the active adaptability adjustment of the current filter coefficient of the feedforward filter, the influence of different wearing modes and different ear canal structures on the noise reduction system can be reduced, the noise reduction effect of the earphone is improved, and the listening experience of a user is improved.

摘要：【中文】本公开涉及一种用于声场均衡的方法和一种耳机。其中方法包括：在耳机未放入耳道的情况下，确定第一滤波器的第一系数，以使得第一滤波器能够模拟耳机所采用的扬声器和耳内麦克风引起的信号失真；在耳机放入耳道的情况下，基于向扬声器传输的第一音频信号和耳内麦克风所采集的第二音频信号以及第一滤波器的第一系数，来确定第二滤波器的第二系数，以使得第二滤波器能够均衡由耳道反射引起的信号失真；基于第一音频信号利用第二系数的第二滤波器进行处理以得到第三音频信号；以及播放第三音频信号。以上方法通过调整滤波器系数来均衡由人耳耳道结构和耳机佩戴方式造成的声场变化，保证用户在不同佩戴方式下都获得高质量的听音体验。 【EN】The present disclosure relates to a method for sound field equalization and a headphone. The method comprises the following steps: determining a first coefficient of a first filter in a case where the earphone is not placed in the ear canal, so that the first filter can simulate signal distortion caused by a speaker and an in-ear microphone employed by the earphone; determining second coefficients of a second filter based on the first audio signal transmitted to the speaker and the second audio signal picked up by the in-ear microphone and the first coefficients of the first filter, with the earphone placed in the ear canal, so that the second filter can equalize signal distortions caused by ear canal reflections; processing the first audio signal by a second filter of a second coefficient to obtain a third audio signal; and playing the third audio signal. The method balances the sound field change caused by the ear canal structure of the human ear and the wearing mode of the earphone by adjusting the filter coefficient, and ensures that a user obtains high-quality listening experience in different wearing modes.

摘要：【中文】本公开涉及一种对耳机进行透传的方法、系统以及耳机。方法包括：确定同个状态下透传滤波器的预设系数和从扬声器到耳内麦克风的传输路径的预设传递函数；在扬声器播放音频信号时，确定从扬声器到耳内麦克风的传输路径的当前传递函数；基于预设系数、预设传递函数及当前传递函数，根据公式F2(z)＝F1(z)·H1(z)·(1/H2(z))确定透传滤波器的当前系统函数，F2(z)为透传滤波器配置当前系数时对应的系统函数，F1(z)为透传滤波器配置预设系数时对应的系统函数，H1(z)为从扬声器到耳内麦克风的传输路径的预设传递函数，H2(z)为从扬声器到耳内麦克风的传输路径的当前传递函数，·表示所连接的系统函数和/或传递函数对应的滤波器的级联；以及以所述当前系统函数来配置透传滤波器，以进行透传。 【EN】The disclosure relates to a method and a system for transparent transmission of earphones and the earphones. The method comprises the following steps: determining a preset coefficient of a transmission filter and a preset transfer function of a transmission path from a loudspeaker to an in-ear microphone in the same state; determining a current transfer function of a transmission path from the speaker to the in-ear microphone while the speaker is playing the audio signal; determining a current system function of the pass-through filter according to a formula F2(z) ═ F1(z) · H1(z) · (1/H2(z)) based on a preset coefficient, a preset transfer function and a current transfer function, wherein F2(z) is a system function corresponding to the pass-through filter when the current coefficient is configured, F1(z) is a system function corresponding to the pass-through filter when the preset coefficient is configured, H1(z) is a preset transfer function of a transmission path from the speaker to the in-ear microphone, and H2(z) is a current transfer function of a transmission path from the speaker to the in-ear microphone, and represents a cascade of the connected system function and/or a filter corresponding to the transfer function; and configuring a pass-through filter with the current system function for pass-through.

摘要：【中文】本申请实施例提供一种音频回声滤波系统及主动降噪系统，音频回声滤波系统包括：回声滤波组件和上采样滤波器；所述回声滤波组件用于以第一采样率获取主动降噪耳机中的待播音频信号，并对该待播音频信号进行滤波处理；所述上采样滤波器用于以第二采样率输出经所述回声滤波组件滤波后输出的待播音频信号，且该第二采样率大于所述第一采样率；所述上采样滤波器以所述第二采样率输出的待播音频信号与所述主动降噪耳机内的反馈降噪通路以所述第二采样率输出的音频回声信号进行叠加，以消除所述反馈降噪通路中的音频回声信号。本申请能够在降低降噪通道对播放音乐的影响的同时，有效降低音频回声滤波的采样率。 【EN】The embodiment of the application provides an audio echo filtering system and an active noise reduction system, and the audio echo filtering system comprises: an echo filtering component and an up-sampling filter; the echo filtering component is used for acquiring an audio signal to be broadcasted in the active noise reduction earphone at a first sampling rate and filtering the audio signal to be broadcasted; the up-sampling filter is used for outputting the audio signal to be broadcasted after being filtered by the echo filtering component at a second sampling rate, and the second sampling rate is greater than the first sampling rate; and the audio signal to be broadcasted output by the up-sampling filter at the second sampling rate is superposed with the audio echo signal output by the feedback noise reduction passage in the active noise reduction earphone at the second sampling rate so as to eliminate the audio echo signal in the feedback noise reduction passage. The method and the device can effectively reduce the sampling rate of the audio echo filtering while reducing the influence of the noise reduction channel on the playing of music.

摘要：【中文】本公开涉及一种耳机的降噪方法、自适应FIR滤波器、除噪滤波器组和耳机。所述降噪方法包括：采集外部环境噪声信号；基于外部环境噪声信号利用第一无限冲激响应(IIR)滤波器滤波以得到第一噪声参考信号，以抵消耳外麦克风和扬声器的作用；采集残留噪声信号，并基于残留噪声信号和第一噪声参考信号来调整第一有限冲激响应(FIR)滤波器的系数；利用第一FIR滤波器对第一噪声参考信号进行滤波，并经由扬声器输出耳内反向噪声，以与进入耳内的噪声空中对消。该方法能针对耳机佩戴姿势、耳结构和噪声场景变化中的任一种自适应调整FIR滤波器的滤波器系数，在实现自适应快速收敛且FIR滤波器的阶数较低的情况下，对不同情况下的噪声均达到好的抑制效果。 【EN】The disclosure relates to a noise reduction method of an earphone, an adaptive FIR filter, a denoising filter bank and the earphone. The noise reduction method comprises the following steps: collecting an external environment noise signal; filtering with a first Infinite Impulse Response (IIR) filter based on the external ambient noise signal to obtain a first noise reference signal to counteract effects of the out-of-ear microphone and the speaker; acquiring a residual noise signal and adjusting coefficients of a first Finite Impulse Response (FIR) filter based on the residual noise signal and a first noise reference signal; the first noise reference signal is filtered with a first FIR filter and the in-ear inverse noise is output via the speaker to cancel in-air with the noise entering the ear. The method can adaptively adjust the filter coefficient of the FIR filter according to any one of the wearing posture of the earphone, the ear structure and the noise scene change, and achieves good suppression effect on the noise under different conditions under the conditions of adaptive rapid convergence and low order of the FIR filter.

摘要：【中文】本发明实施例提供了一种回声消除方法及装置，方法包括：对来自麦克风的音频信号按照第一预定分解规则进行子带分解，以得到N路子带音频信号；通过N个自适应回声消除滤波器对N路子带音频信号进行自适应回声消除处理，以得到N路滤波后的子带音频信号，其中，一个自适应回声消除滤波器处理一路子带音频信号；按照预定合并规则将N路滤波后的子带音频信号合成为自适应回声消除处理后的音频信号。本发明实施例通过对输入麦克风的音频信号进行子带分解的方式，降低了数据采样率，进而降低了多路消回声算法中每一路音频信号消回声的复杂度，降低了系统功耗。 【EN】The embodiment of the invention provides an echo cancellation method and device, wherein the method comprises the following steps: performing subband decomposition on the audio signal from the microphone according to a first preset decomposition rule to obtain N paths of subband audio signals; carrying out adaptive echo cancellation processing on N paths of sub-band audio signals through N adaptive echo cancellation filters to obtain N paths of filtered sub-band audio signals, wherein one adaptive echo cancellation filter processes one path of sub-band audio signal; and synthesizing the N paths of filtered sub-band audio signals into an audio signal subjected to adaptive echo cancellation according to a preset combination rule. The embodiment of the invention reduces the data sampling rate by carrying out sub-band decomposition on the audio signal input into the microphone, thereby reducing the complexity of echo cancellation of each path of audio signal in a multi-path echo cancellation algorithm and reducing the power consumption of a system.

摘要：【中文】本公开实施例提供了一种无线耳机组件以及无线通信系统，无线耳机组件包括第一耳机和第二耳机，每个耳机的蓝牙模块被配置为：检测该耳机与另一耳机是否保持蓝牙连接，以及确定该耳机的接收信号强度指示(RSSI)；该耳机或另一耳机的处理器被配置为：在该耳机与另一耳机保持蓝牙连接的情况下，判定该耳机的RSSI的代表值是否小于第一阈值，如果是，则确定该耳机丢失，通过上述技术方案实现对无线耳机的防丢失功能，本公开实施例还提出了无线通信系统，实现通过两个耳机对另一设备是否丢失进行判断，以及通过另一耳机和另一设备对该耳机是否丢失进行判断，以使耳机不仅能够判断耳机的丢失，还能够判断另一设备的丢失。 【EN】The disclosed embodiments provide a wireless headset assembly and a wireless communication system, the wireless headset assembly comprising a first headset and a second headset, the bluetooth module of each headset being configured to: detecting whether the headset remains bluetooth connected with another headset, and determining a Received Signal Strength Indication (RSSI) of the headset; the processor of the or another earpiece is configured to: the embodiment of the disclosure further provides a wireless communication system, which determines whether the other device is lost through the two earphones, and determines whether the earphone is lost through the other earphone and the other device, so that the earphone can determine not only the loss of the earphone but also the loss of the other device.